with three and a half million residents, it's south africa's second largest city after johannesburg. edwin and mervin collins run a snack bar right in the center of town. >> there's chicken or pork on offer -- but the traditional item here is a uniquely south african grilled sausage invented by the first european settlers. it's called boerewors. >> it has a distinct taste, like it's from the farm, and that's what it is -- farm sausage, boerewors, boere are farmers. the sausages consist of 30% pork, twice as much beef, and lots of fat. but the distinct taste comes from the spices used to flavor the meat and the sauces. we put 5 different spices, spices you don't normally associate with woers. like coriander, cumin, vinegar -- obviously salt and pepper -- and i forget the other two. >> the brothers were once successful entrepreneurs. but they went broke two years ago in the midst of the economic crisis. but they're not bitter. now they're grill chefs and vying with humor for every customer. most of the customers are employees from the nearby offices and shops. >> it's just a quick snac